<!DOCTYPE HTML>
<html reftest-async-scroll
      reftest-displayport-x="0" reftest-displayport-y="0"
      reftest-displayport-w="800" reftest-displayport-h="2000"
      reftest-async-scroll-x="0" reftest-async-scroll-y="1000">
<body style="overflow: hidden; height: 3000px; margin: 0;">
  <div style="height: 1200px;
              background: linear-gradient(white, white) top left fixed no-repeat;">
  </div>
  <div style="width: 200px; height: 100px; background: lime;"></div>
</body>
</html>
